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WorksheetsInternal Energy and Thermodynamics
Total questions: 12
Worksheet time: 9mins
Name
Class
Date
1.
The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and
a)
mass
b)
work done
c)
force
d)
pressure
2.
What does the "U" stand for the formula ∆U = Q + W
a)
Heat
b)
Temperature
c)
Work
d)
Internal energy
3.
The average kinetic energy in a substance is its...
a)
Heat
b)
Temperature
c)
Internal energy
d)
Work
4.
The total amount of energy in a system is ALWAYS ________.
a)
increasing
b)
decreasing
c)
conserved
d)
changing
5.
The first law of thermodynamics states that energy is
a)
created
b)
destroyed
c)
conserved
d)
created and destroyed
6.
1200 J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas?
a)
800 J
b)
1600 J
c)
-800 J
d)
-1600 J
7.
When applying the first law of thermodynamics to a system, when is heat a positive quantity?
a)
when the system does work
b)
when the system has work done on it
c)
when the system absorbs heat
d)
when the system loses heat
e)
when no work is done either on the system or by the system
8.
Which of the following equations is the equation for calculating the work done by a gas in a piston?
a)
W=Fd
b)
W=PΔV
c)
ΔV=Ad
d)
A=πr2
9.
Symbol that indicates that energy is released.
a)
U
b)
Q
c)
-Q
d)
W
10.
Internal energy depends on
a)
Only pressure
b)
Only Volume
c)
Only Temperature
d)
Only Mass
11.
The first law of thermodynamics tells us...
a)
Heat flows from hot to cold
b)
The amount of heat put into a system is the amount of energy that system gains.
c)
Absolute Zero cannot be reached
12.
The product of the pressure and volume of a system has the same SI units as which one of the following choices?
a)
force
b)
work
c)
acceleration
d)
momentum
e)
impulse
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